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Calculate Your Monthly Electric Bill

Estimate your monthly electricity bill from appliance usage. Find what is driving your bill up.

📅 Updated April 2026 Formula verified 📖 4 min read 🆓 Free · No sign-up

What Drives Your Electric Bill

HVAC (40-50%): Heating and cooling is almost always the biggest electricity consumer. A central AC running 8 hours/day costs $125-175/month. Water heating (14-18%): Electric tank heaters cost $35-55/month. Lighting (5-10%): LED bulbs cut lighting costs by 75% vs incandescent. Everything else (25-30%): Fridge, washer, dryer, electronics, cooking.

Biggest Savings Opportunities

Smart thermostat: $100-200/year savings (10-15% of HVAC). LED bulbs: $75-150/year (if replacing incandescent). Heat pump water heater: Uses 60-70% less energy than standard electric. Seal air leaks: $50-200/year (weatherstripping, caulking). These four changes save the average household $300-600/year.

⚡ CalcWolf Insight

The cheapest electricity is the electricity you do not use. Sealing air leaks (weatherstripping doors and caulking windows) costs $20-50 in materials and can reduce HVAC costs by 10-20%. This is the highest-ROI home improvement project possible — $20 investment saving $100-200/year.

Frequently asked questions
Why is my electric bill so high?
The most common culprits: HVAC running too much (check thermostat settings and air filter), old water heater (replace if 10+ years old), incandescent light bulbs (switch to LED), and phantom loads (electronics on standby). Start by checking your HVAC — it is almost always the biggest bill driver.
How much does AC cost per month?
Central AC (3 ton): $125-175/month running 8 hours/day at $0.15/kWh. Window AC: $40-65/month. A programmable thermostat that reduces runtime by 2 hours/day saves $30-50/month.
✓ Math logic verified against primary sources → See our verification process
Kevin Glover
Founder, CalcWolf · GLVTS · Blickr
All formulas sourced from primary references — IRS publications, peer-reviewed research, and official standards. Results are tested against independent reference calculators before publishing. Rates and brackets updated when official sources change. Editorial policy →
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Found a bug or outdated data? Reports go directly to Kevin and are reviewed personally.